Question 13 II Pause
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Question 13
A photographer needs $4000 to purchase a printer for her new business. Each photo that she prints will cost an additional $3.56 for ink. She plans on selling each photo for $9.99 each.
Which of the following equations represents the profit, P(x), the photographer will make for each photo, x, that she sells?
P(x) = 6.43x + 4000
A
B
P(x) = 6.43x - 4000
С
P(x) = 13.55x + 4000
D
P(x) = 13.55x - 4000

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify